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在天体力学发现之前,人们的公约是牛顿力学,是经过实践验证过的. :-)

flying_snow (飞雪浮冰)
(#79185@0)
2001-5-23 -04:00
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Back To Topic: 一个小小的guest权限大家就吵得不可开交,所以领导13亿人口的国家是多么的不易,不当家不知柴米油盐贵呀。

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